Dental engine



(No Model.) 2 Sheets-Sheet 1. A. BETTER.

DENTAL ENGINE.

No. 426,328. Patented Apr. 22, 1890'.

' (No Model.) 2 Sheets-Sheet 2.

A. BETTER.

DENTAL ENGINE.

No; 426,328. Patented Apr. 22, 1890.

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- UNITED STATES PATENT OFFICE.

ARVED BETTER, OF UTIOA, NEW YORK.

DENTAL ENGINE.

SPECIFICATION forming part of Letters Patent No. 426,328, dated April 22, 1890.

Application filed August 16, 1889. Serial No. 320,954, (No model.)

T0 on whom it may concern:

Be it known that I, ARWED BETTER, a citi zen of the United States, residing at Utica, county of Oneida, State of New York, have invented certain new and useful Improvements in Dental Engines, of which the following is a specification.

My invention relates generally to improvements on the dental engine shown, described, and claimed in my previous application, Serial No. 317,023, filed July 10, 1889.

My invent-ion relates more particularly to the arrangement of the fan in connection with the motive power of the engine, but includes also other features hereinafter referred to, and particularly pointed out in the claims. The purpose of the fan is to produce a circulation of air, which has the effect of soothing the patient, and thereby enabling the dentist to work with greater precision, effectiveness, and safety.

Referring to the accompanying drawings, which form a part of this specification, Figure 1 is a side elevation of my improved dental engine with attachments, portions of it being cut away for the more convenient showing of same. Fig. 2 is a longitudinal section of the main horizontal operating-shaft, show ing the means for interlocking the finger of the flexible shaft. Fig. 3 shows the construction of the retaining-collar of the supplementary bracket.

In the drawings, 1 represents a base or bed plate, which rests upon the floor, and which is adapted to support the engine and maintain it in an upright position. This base or bed plate may be constructed in a manner similar to the one shown and described in my previous application above referred to.

A poWer-transmittin g pulley, suitably supported is shown at 22, and a power-receiving pulley set in the same vertical plane as the pulley 22 is shown at 38. The two pulleys are connected by a band or chain 70.

The standard 3 is suitably supported from the base 1 and extends upwardly and on the same vertical line as the power-transmitting pulley 22, and at its upper end is provided with a sleeve 23. The sleeve 23, which supports the bracket 27, is retained at any desired height and position by means of the .terminus of the flexible shaft 42.

thumbscrew 31. The sleeve 23 is split from the bottom upward a portion of its height, as shown in Fig. 1, which adapts it the more effectively to fit over and grasp the standard 3. By this means I provide a free swinging movement for the bracket or pulley-arm when desired.

A sliding collar 31 is provided with a thumb-screw 31", which may be utilized for assisting in the retention of the sleeve and its superimposed bracket in the proper vertical position.

In immediate proximity to the p0wer-receiving pulley 38 is the supplementary pulley 39, mounted upon the same shaft as the said power-receiving pulley and in immediate juxtaposition thereto. The pulley 39 is con nected by means of a band 58 to auxiliary pulley 53, the latter being utilized for the purpose of conveying power to the shaft of the rotating or revolving fan 56. The fan is supported upon a shaft 54, and this shaft is mounted in a supplementary bracket or arm 50, the said bracket being provided at its lower end with an inclosing yoke which is adapted to the main horizontal sleeve or bear ing 36, and is retained and locked into position by any suitable means, such as a lock= ing-bolt 50". The fan maybe of any suitable construction.

In Fig. 2 is shown an improved method of locking the flexible shaft to the main horizontal shaft 35. This horizontal shaft is provided with a longitudinal opening, and has at the point 35 a lug or shoulder, which fits into a corresponding longitudinal groove 4E1 of the finger or arm 4C1, which forms the inner By this means the flexible shaft is locked to the horizontal shaft 35, and is made to partake of the rotating movement of the shaft 35 when it re volves, and is locked longitudinally in posi tion by means of the clasp or hook 77, which engages over the annular collar 73 of the sleeve 40. It is kept in a normal locked position by means of a spring 79.

It will be seen that the power-transmitting pulley 22 and the power-receiving pulley 38 are in the same vertical line or plane and that the pulleys 39 and 53 lie in immediate juxtaposition thereto,both sets of pulleys and their transmitting-bands being approximately in the same vertical plane. The flexible shaft 42 i? inclosed in a flexible sleeve, (shown at 42.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. In a dental engine, the combination of a power-transmitting pulley, a vertical standard, a power-receiving pulley supported by said vertical standard, a connecting-band, a supplementary pulley mounted upon the same shaft as the power-receiving pulley and immediately in juxtaposition thereto, and an auxiliary pulley for operating afan, said auxiliary pulley being arranged in the same vertical plane as the supplementary pulley aforesaid.

2. In a dental engine, the combination of the power-transmitting pulley located at or near the base of the engine, a vertical standard, a power-receiving pulley arranged in the same vertical plane as the power-transmittin g pulley and connected thereto by suitable band or chain, and a supplementary pulley attached to the power-receivingpulley and connected by means of a band to an auxiliary pulley, said auxiliary pulley being mounted on a shaft and the said shaft being provided with a fan,- and all the pulleys being arranged in approximately the same vertical plane.

3. An attachment for dental engines, c011- sisting of a fan or air-agitator upon an auxiliary shaft rotated from some revolving member of the engine, said auxiliary shaft being distinct and laterally removed from the operatingshaft, substantially as and for the purpose set forth.

4. In a dental engine, the combination of a flexible shaft for operating the tool, the flexible sleeve for inclosing the same, a horizontal operating-shaft, a bracket for supporting the shaft, and a clasp or hook mounted on the sleeve of the operating-shaft and provided with a spring, whereby the hook may be'made to automatically engage with a collar or rim upon the periphery of the shaft relatively to a collar or rim of the sleeve of the powerconveying or flexible shaft-inclosing sleeve, as set forth.

5. In a dental engine, the combination of the flexible shaft and the flexible sleeve inclosing the same, the said shaft terminating at its outer end in a slotted tip or finger, said tip or finger being provided with a longitudinal groove adapted to engage with a corresponding shoulder on the interior of the hollow operating-shaft, all arranged substantially as and for the purposes set forth. 6. In a dental engine, the combination of the fan, the horizontal shaft on which it is mounted, and the supplementary standard for supporting said shaft, said supplementary standard being shaped at its lower end in the form of a yoke and straddling the main horizontal sleeve, as shown, and removably connected thereto in any suitable manner, as and for the purposes set forth;

7. In a dental engine, the combination of the horizontal shaft 35, its supporting-bracket or pulley-arm 27, the downward]y-extending sleeve 23, split as shown, and having a clamp 31, the sliding collar 31, having the thumbscrew 3i", and the upright standard 3, inserted within said sleeve, all being arranged substantially as shown, so as to facilitate clamping and releasing the said bracket or pulleyarm, and to enable said arm to be swung around the shaft as an axis and fixed at any desired horizontal angle at will.

ARVVED BETTER.

WVitnesses:

GEORGE SHOTTHAFER, IRA W. PARRY. 

